Electrical switch



"Ma 12, 1936. A R WR R ET AL 2,040,214

ELECTRICAL SWITCH Filed Nov. 17, 1934 A xf) 30 24 Inventors 7 M7 a/z/kez /e I 25 v7, Jc/wa v/ UNITED STATES PATENT OFFICE ELECTRICAL SWITCH Angelo Ramirez, In, Brooklyn, and Angelo Schiavi, New York, N. Y.

Application November 17, 1934, Serial No. 753,514

1 Claim.

This invention. relates to mechanisms for sharpening pencils, and more particularly to an electrically operated pencil sharpener adapted to be used as a portable or stationary device wherever electric current is available.

An object of the present invention is the provision oi' an improved electrical switch for controlling the operation of the pencil sharpener.

The invention together with' its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawing:

Figure 1 is a side elevational view of a pencil sharpener embodying the features of the present invention.

Figure 2 is a longitudinal sectional view through a guide tube forming part of the invention.

Figure 3 is a transverse sectional view taken substantially on the line 3-3 of Figure 2.

Referring to the drawing by reference numerals it will be seen that the pencil sharpener comprises a substantially rectangular frame ID the bottom member of which is formed with an integral lateral platform I l. Mounted on the bottom 2 member of the frame is a pedestal l2 that supports an electric motor l3. Motor l 3 has provided on the end of the armature shaft H a cutter head I! having two rotataole cutters IS. The cutters l6 have their axes disposed oblique with rela- 30 tion to eachother so that, as shown, the inner ends of the cutters are nearer to each other than are the outer ends of the cutters. The cutters i6 at their inner ends are suitably geared to head IE to be driven thereby. The forwarding ends of the 35 cutters l6 are journaled in a revolving cross head l9 comprising an integral part of the rotatable head l5. The head l9 also has integral therewith a tubular hub No.

A downwardly opening shell 20 is suitably 40 mounted on the head l5 and in one end wall is provided to accommodate the hub Ma. The shell 20 is of any suitable construction consisting substantially of a suitable frame having a transparency mounted therein to provide a transparent or sight window for the shell.

A central guide tube 22 is provided at one end with apertured flanges 23 whereby through the medium of fastening means 24 said end of the 50 tube is secured to an adjacent end of the frame ill. a

At the other end thereof the tube 22 is similarly provided with a flange 23a whereby the tube at said end is secured through the medium of fastening elements 24a with the shell 20. The tube 22 55 is disposed in alignment with the hub No for the insertion of a pencil 25 between the cutting members IS.

The shell 20 opens directly over a drawer or receptacle 26 supported on the platform part II of the frame III for catching the shavings from the 5 sharpener. The shell 20 is also steadied and supported from the top member of the frame Ill through the medium of a suitable bracket 21.

Our improved sharpening machine is of that type wherein the circuit of the motor [3 includes 10 a normally opened controlled switch that is closed to set the motor in operation by the insertion of a pencil into the machine, As herein shown the pencil guide or nipple 22 has arranged therein a leaf spring contact 28 which is disposed longi- 15 tudinally with relation to the axes of the guide tube 22, and whose free end is cooperatively disposed with relation to, but normally out of contact with, a contact member 29, which contact member 29 together with the binding post 28a for 20 the contact 28 is mounted in a block 30 of insulating material disposed externally of and extending lengthwise of the guide tube 22. The contacts 28 and 29 are arranged in circuit with the motor l3 through the medium of a suitable electric cord 25 3|.- The cord 3| is held out of the way through the medium of guide elements 32 secured to the top member of the frame Ill.

The contact member 28 is releasably and normally retained out of engagement with the con- 30 tact member 29 through the medium or a spring 33 interposed between the wall of the guide chamber 32 and the spring contact member 28 as shown in Figure 5.

From the above it will be understood that as 35 soon as the pencil is inserted into the machine for the sharpening thereof, the pencil, in passing through'the tube 22 will engage the contact 28 n and urge the same-upwardly against the action of spring 33 into engagement with the contact 29 40 thus completing the circuit to the motor I3 which of course will set in operation the cutter members ii for sharpening the end of the pencil inserted between these members as is apparent. When the pencil is withdrawn through the tube 22 contact member 28 under, action of spring 33 will move to the normal position out of contact with the contact member 29 thus interrupting the motor circuit and thereby stopping the motor substantially simultaneously as the pencil-sharpening process is completed.

Having thus described the invention what is claimed as new is: I

An electrical switch for pencil sharpening machines comprising an insulating support disposed onthomddnofthemdembeoflhemumno nndmvlnlwedelecmcd contact therein. 0:- hndlnlthrouzhapermreslnthe Mdetubo, mtlctsrmmm'datmotlumdlcntm muddootnidtubotoomdmdconmtsund mbentunlbaltthnotherendmendmlbulow lacothnountlctmdldwtedtoelecmcfllyenunthnammaddoonmtumhavmzamconhllportlonanddimdniluewflom. adrelflhnt means dlspoaedbetwoenthelnnu' ddool nidtubeandtholnnerndeoftheflstporflon otaldcontlctnmandnwmflburzm thon'm out of electrical amazement with the contact whmbywonthcmaerflonotapencflmtbo 5 guide tube the contact arm is brought into electrical engagement with the atstlomry cannot. ANGEIO RAMIREZ. Jl. ANGEDBCHIAVI. 

